216707610262469 has 2 divisors, whose sum is σ = 216707610262470. Its totient is φ = 216707610262468.

The previous prime is 216707610262447. The next prime is 216707610262483. The reversal of 216707610262469 is 964262016707612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213582528778369 + 3125081484100 = 14614463^2 + 1767790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216707610262469 is a prime.

It is a super-2 number, since 2×216707610262469² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216707610262439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108353805131234 + 108353805131235.

It is an arithmetic number, because the mean of its divisors is an integer number (108353805131235).

Almost surely, 2^{216707610262469} is an apocalyptic number.

It is an amenable number.

216707610262469 is a deficient number, since it is larger than the sum of its proper divisors (1).

216707610262469 is an equidigital number, since it uses as much as digits as its factorization.

216707610262469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18289152, while the sum is 59.

The spelling of 216707610262469 in words is "two hundred sixteen trillion, seven hundred seven billion, six hundred ten million, two hundred sixty-two thousand, four hundred sixty-nine".